本論文的內容主要是在實作電路上實現直流馬達的速度控制。並且解決直流伺服馬達在轉動時產生的雜訊對控制器電源的干擾。首先吾人設計可檢測馬達電流的直流馬達驅動電路,使用可程式數位邏輯器,設計脈波寬度調變的功能,再以單晶片AT89c52作為控制計算的核心,利用脈波寬度調變的方式推動功率晶體MOSFET,驅動直流馬達動作,並經由霍爾元件依直流馬達轉速產生必要的脈波,已完成速度迴授的目的。
In this paper, the major content realize the speed control of DC motor by circuits we design. The power supply of controller is disturbed by noise that is produced when motor rotating. In order to solve the problem, first we design driving circuits used to check the current of motor. We use the technologies of PLD and PWM then the micro- processor of AT89c52 is regarded as the core of calculation. Using PWM to drive the MOSFET and DC motor, the purpose of speed feedback is achieved by the necessary pulses produced rotation rate according to the Hall elements.